Controlling apparatus.



A. E. NORRIS.

CONTROLLING APPARATUS.

APPLICATION FILED FEB. 9. 1909. RENEWED AUG. 31, 1914.

Patented May 2, 1916.

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A E. NORRIS.

CONTROLLING APPARATUS.

APPLICATION FILED r55. 9. 1909. RENEWED AUG. 31. 1914.

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A. E. NORRIS.

CONTROLLING APPARATUS.

APPLICATION FILED FEB. 9. 1909. RENEWED AUG. 3!, 1914.

1,181,980. Patented May 2,1916.

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CONTROLLING APPARATUS.

Specification of Letters Patent.

Patented May 2, 1916.

Application filed February 9, 1909, Serial No. 476,947. Renewed August31, 1914. Serial No. 859,562.

To all whom it may concern Be it known that I, ALMON E. Noums, a citizenof the United States, residing at Cambridge, in the county of Middlesexand State of Massachusetts, have invented an Improvement in ControllingApparatus, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts.

My invention relates to improvements in controlling devices, the samebeing more particularly, though not exclusively, in tended for thecontrol of hoisting apparatus.

In the following description I have shown one embodiment of my inventionas applied to the control of a self-propelled trolley carriage equippedwith a grab or bucket, but my invention is applicable also to hoistingapparatus equipped with other forms of load carrying devices and tosystems employing other than self-propelled carriages.

In the specific embodiment of my invention herein shown theself-propelled trolley carriage is operated through means of a pluralityof electric motors, and my invention as to certain of its aspectsrelates to the effective and simple control of electric or other motors,and, in this respect, is applicable not only to hoisting apparatus butother devices as well.

My invention will be best understood by reference to the followingdescription when taken in connection with the accompanying illustrationof one specific embodiment thereof, while its scope will be moreparticularly pointed out in the appended claims.

In the drawings: Figure l is a side elevation of a self-propelledbucketsustaining, trolley carriage embodying one form of my invention;Fig. 2 is a detail in side elevation of the magnetically released brakeemployed both for the traversing and grab-operating motors; Fig. 3 is aplan view partly broken away showing the hoisting and traversingmechanism for the trolley carriage; Fig. at is a side elevation inpartial section and partly broken away showing the cab or operatorscompartment fitted with the controlling levers, Fig. 5 is acentral,sectional elevation partly broken away, and on an en:

larged scale, showing the main controlling levers for the hoisting andtraversing motors; Fig. 6 is a diagram illustrative of electricalconnections which may be employed on the controller for the traversingmotor; and Fig. 7 is a diagram illustrative of the connections which maybe employed on each of the controllers for the two grab operatingmotors.

Referring to the drawings and more particularly to Fig. 1, wherein isillustratively shown one form of my invention, the trolley carriage 1may be of any suitable construction, it being herein shown as providedwith the truck wheels 2 mounted to run upon the trackway 3, the lattersustained by the structure 4, which may be a tower, bridge or otherelevated structure along which the conveyance of coal or any othermaterial is desired.

The truck wheels 2 are driven by means of the two electric traversingmotors 5, the latter being operatively connected to axles through adriving pinion 6 and gear 7. Electric current is supplied to thecarriage from any suitable source and by any of the well-known devices(not here shown), the

motors herein being simultaneously controlled by means of a singlecontroller 8 located in the cab 9 which depends between the tracks fromthe trolley carriage.

lVhile, as will be more fully described, the traversing motors may beconnected through their controller dynamically to retard or brake thetrolley carriage, for emergency purposes such, for example, as in thecase of the cutting off of the supply current, or to serve as asupplemental or aux iliary brake, each motor shaft is provided with anemergency brake 10, herein of the band brake pattern, encircling a brakedrum 11 and adapted to be applied by means of a rope or cable connectedto the end of the brake lever 12 and leading to the cab. The controllingrope 13 for one brake passes upward over the sheave 14, thence to thesheave 15 and thence to the cab. The remaining rope 16 passes up andover the pulley 17 and thence downward about the pulley 18 (see Figs. 3and 4). In the cab they are joined to form a single depending loop whichpasses about the guide sheave 19, the latter ournaled in the frame 20and connected to the foot lever 21 which is pivoted at 22. The footlever is located directly beneath the operators seat 23in the cab, sothat the brakes may be readily applied by him when a positive stop isrequired.

Referring now to the grab or bucket 24 and the controlling devicestherefor, the former may be of any usual and ordinary constructionprovided with usual jaws adapted to be opened and closed by the openingand closing rope 26, while the bucket as a whole may be held, or raised,or lowered by means of the hoisting or holding rope 27 The opening andclosing rope 26 leads upward over and about a rope-winding drum 28arranged transversely on the trolley carriage, while the hoisting rope27 is wound upon a similar rope-winding drum 29 arranged parallel withthe opening and closing drum. Herein, for the sake of balancing thegrab, each winding drum, as shown in Fig. 3, has two rope-receivingportions, and a double rope or cable is employed both for opening andclosing and hoisting, one portion being wound upon each end portion ofeach winding drum. Such feature, however, is immaterial so far as thepresent invention is concerned, and a single opening and closing ropeand a single hoisting rope may be employed without distinction.

Herein the opening and closing drum 28 is driven through the drivinggear 30, which latter meshes with the driving pinion 31, the latterdriven in turn by means of the electric motor 32. On the other hand, thehoisting drum 29 is driven through the driving gear 33, driving pinion34 and the electric hoisting motor 35.

Herein I have provided in or adjacent the cab 9 a controller 36 forcontrolling the opening and closing motor 32 and a separate controller37 for the hoisting motor 35, and have so arranged and consolidated theoperating devices for these two controllers, together with the operatingdevices for the controller for the traversing motors, that the operator,while in his assigned position, holds within the grasp of his two handsall the elements of control for traversing the trolley carriage, raisingand lowering the grab and opening and closing the jaws thereof.

Referring now more particularly to the controlling devices through whichthe operator controls the operation of the several motors, the specificarrangement for which is shown in Fig. 5, the controller 36 has itscontroller shaft 38 connected to be turned through the bevel pinion 39,while the controller shaft 40 for the hoisting controller 37 issimilarly turned through the bevel pinion 41. Meshing with the pinions39 and 41 are the bevel gears 42 and 43 re spectively, these beingmounted on hollow sleeves 44 and 45, the latter journaled in stationarybrackets 46 and 47 respectively.

To the opposite end of the sleeve 44 is keyed a depending operatinglever 48, while to the sleeve is similarly fastened an operating lever49, such levers hanging down in front of the operators seat 23 andpresenting to the operator, when the latter occupies such seat, thelaterally projecting 7 5 inturned handles 50 and 51. By means of theoperating levers described the operator can turn either controller shaftat will and thereby has at his command the independent control of boththe hoisting motor and so the opening and closing motor.

The traverse of the carriage is controlled by devices preferably withinthe grasp of the operator while still exercising his control over theoperating levers for the two controllers described. While this may beaccomplished in various ways, herein the two sleeves 44 and 45, to whichare keyed the operating levers, are in axial alinement and through themextends the axially movable ojjJerating rod or member 52 which carriesat one end the toothed rack 53 meshing with the pinion 54 on thecontroller shaft of the traversing controller 8. The axial movement ofthe operating rod 52, therefore, serves to turn the traversingcontroller in either direction at will.

To maintain normally the operating member in'an intermediate and neutralpo sition, the latter is provided with collars 55 pinned thereto, suchcollars having a diameter less than the axial bore of the sleeves 44 and45, and is also provided with washers 56 of a diameter greater than thatof the axial bore, there being provided between 1 7 the said washers thecoiled spring 57. This maintains the operating rod normally in a neutralposition with the washers resting against the inner face of the bevelgears 42 and 43, but permitting the rod to be moved in either directionat will. For example, the righthand end of the rod, as viewed in Fig. 5,is forced to the left, the right-hand collar 55 forces the adjacentwasher against the spring and the latter being compressed the rod movesto the left, as is represented in dotted lines.

To control at will the movement of the operating rod, the latter isprovided at each end and on the outside of the operating levers and gearsleeves, with pairs of fixed collars-'58 and 59 respectively, betweenthe members of each pair of which are secured the loosely rotatingsleeves 60 and 61 jointed to the bell crank levers 62 and 63. The latterare pivoted each upon the adjacent operating lever, the bell crank lever62 having its opposite arm connected to the link 64, whiclnin turn, isjointed to the hand grip or lever 65 pivoted to the under side of theinturned handle 50, so that the operator when desired can, Withoutlosing his control over the said handle, squeeze the .said grip more orless and thereby move the operating rod to the left. Similarly, theremaining bell crank lever 63 is jointed to the link (36 and the latterto the pivoted hand grip 67 underlying the handle 51.

The operation of these controlling devices will be apparent. As theoperator presses on the hand grip 65, moving it to the dotted lineposition shown, the operating rod is moved to the left and the hand grip67 moves slightly outward, as shown in dotted lines, Fig. 5. This turnsthe controller shaft in one direction, while opposite movement may beimparted thereto by squeezing the hand grip 67 and relieving the handgrip 65. This control of the traversing motor is effected withoutrelinquishing any of the control exercised over the grab orbucketmotors.

Not only is the starting and stopping of the bucket and traversingmotors con trolled by the controlling devices described, but also theretardation and braking of such motors. This may be accomplished invarious ways, but herein for purposes of illus tration it is shown aseffected by electric means, this being done by so connecting the fieldsand armature of each motor at a certain position or positions of thecontrolling handle as to cause it to run as a generator and exert adynamic braking effect.

In Fig. 6 I have shown a simplified controller diagram for thetraversing motors which is sufficient to illustrate the principles ofthis system of control, although in actual practice additional elementsof control, such as relay magnets. overload switches and other deviceswell-known in this class of apparatus may be and prefei ably will beemployed and the controller 8 may and preferably will be a mastercontroller operating a main controlling device. Herein, however,consideration of such features is omitted for the sake of simplicity.

Referring to Fig. 6, a development of the controller drum is shown, atone end of which are indicated the controller contacts. the positiveline contact being shown at 68 and the negative contact at 69. The motorfields are connected to the contacts 70 and T1 and the armature to 72and 73. Additional contacts 7% to 77 inclusive are pro vided. resistancecoils being interposed be tween the contacts 74 -75- and 7 57 6.

In the neutral position of the operating rod 52, which position isdesignated at 0 in Fig. 6, the stationary cont-acts are entirelydisconnected from the drum contacts and the motor circuit is open. Inthis position, as will appear later, the motor is preferably held fastagainst movement in either direc tion. Movement of the controller drumin either direction, whether to the position a or a, connects the fieldsand armature of the motor in short circuit so that, while the motor mayturn, it acts as a generator or dynamic brake with its braking effect ata maximum. Movement of the controller to the positions Z) or b, c or 0'acts gradually to reduce the braking effect of the motor by cutting intocircuit therewith one or more of the resistance coils connected betweenthe contacts Tet. 75 and 76. If the controller is moved from theposition indicated at c to that indicated at (Z the motor is then connected to the feed mains but with all resistance coils in circuit. Thiscauses the motor to run in one direction as a motor at its slowestspeed. If the controller is moved to the opposite but correspondingposition d the motor is driven and the carriage traversed in theopposite direction. By moving the controller to the position 6, e or f.f successive resistance coils are cut out and the speed of the carriageaccelerated until the maximum is reached.

It will therefore be seen that, by manipulation of the hand gripsdescribed, the car riage may be moved in either direction, or a dynamicbraking effect applied to bring the same to rest.

The contacts are so arranged. it will be observed, that, if thecontroller is moved to slow down the speed of the carriage in pass ingthrough successive positions, it acts first to reduce the speed of thecarriage and then to impose a gradually increasing retarding effect asconnections are completed to operate the motor as a brake. Finally, ifthe motor is to be reversed, the controller must first be moved throughthat position which affords the maximum braking elfect before such cantake place. In other words, the contacts are so arranged as to providefor a natural and gradually increasing and decreasing retardation oracceleration. as the case may be, in passing from one position toanother.

WVhile the operator may rely upon the emergency brake for locking orholding the trolley carriage fixed and immovable in one particularposition, herein I have provided electro-magnetic means so regulated bythe controller 8 that. when the controller is in its neutral position(designated at 0), the carriage will be held against movement by ositivemeans apart from the dynamic brake referred to. Herein there is providedfor this purpose upon each traversing motor shaft a brake drum '78encircled by a brake band 79. The latter (see Fig. 2. where there isshown a similar brake band 88 for the hoist motor) is split and normallyheld open and freed from the band by the jointed toggle links and 81.The link 81 has also an upright arm 82 connected to the plunger 83 of asolenoid magnet 84 which, it

when energized, draws the arm over to spread the toggle and hold thebrake released. hen the magnet is denergized, however, the brake isapplied by springs 85 encircling the rod 86 passing through the splitends of the band, which springs act against the band causing the same togrip the drum '78.

Referring again to Fig. (5, the magnet 8% is connected between thenegative line and the controller contact 87, and contacts are providedupon the controller drum such that current is supplied from the positivemain through the magnet to energize the same for ll positions of thecontroller except the mid or neutral position 0. The result is that thebrake is held released when acceleration or retardation of the motor isdesired, but automatically applied positively to stop the carriage whenthe hand grips are released.

Referring to Fig. 7, there is shown a similar skeleton diagram ofconnections appro priate for both the hoist motor controller or thecontroller for the opening and closing motor.

In thenormalposition of the controller drum indicated at g, the motor isdisconnected from the line. In such position, however, the motor shaftand, therefore, the winding drum, is positively held against movement bymeans of a band brake 88 constructed and operated similar to the bandbrake 79 for the traversing motor. One such brake is provided for boththe hoist motor and the opening and closing motor, so that the motor isheld fast by the application of the band brake in the mid or offposition of the controller, but automatically released for all otherpositions of the controller.

F or winding in the grab operating rope the controller is first turnedto the position it which releases the band brake and gives the slowspeed. hen turned to the successive positions 2" and j, a graduallyaccelerated sped is secured by cutting out the several resistance coils.\Vhen turned in the opposite direction, 2'. 6., to the positions It, ior j a suitable and graduated retardation to the unwinding of the ropeis effected to a greater or less extent according to the number ofresistance coils cut in or out of circuit. This delicately controls thedescent of the bucket or the opening or closing of the bucket jaws.

Obviously, as many sets of resistance coils or steps and notches to thecontroller may be employed as found needful to secure the desiredgraduation in the control.

While I have herein shown and described for purposes of illustration onespecific embodiment of my invention, it is to be understood that thesame is not limited to the specific arrangement of parts herein shown,or the details of construction disclosed, but that extensive deviationsmay be made from the description herein without departing from thespirit of the invention. 7

Having thus described my invention, what I claim is:

1. In a system of control the combination with electric motors, of apair of controlling levers, an electric controller operated by eachlever, a third motor and controller and controlling devices within thegrasp of the operator while exercising his control upon the saidcontrolling levers for operating said third controller.

2. In a system of control the combination with a pair of electriccontrollers, each having its controlling shaft, a pivoted controllinglever for each, operative connections between each controlling lever andits controller comprising a gear connected to turn with the lever and anintermeshing gear connected to turn each its controller, said operatinglevers being pivoted in axial alinement, a third controller, anoperating member connected to move said third controller and extendingaxially through said operating levers, means upon the operating leversfor reciprocatively moving said axially movable operating member, thesame comprising a pivoted hand grip upon each lever, bell crank leverpivoted on the operating lever and connected both to said op eratingmember and said hand grip, one of said hand grips being operative tomove said operating member in one direction and the other in theopposite direction, and means for maintaining said operating member noranally in a neutral or intermediate position 3. The combination withelectric motors and controlling means therefor, of operating devices forsaid controlling means comprising a. pair of operating levers, acontrolled member for each, and operating connectionr between the same,a third motor and con trolled member, and means upon one of saidoperating levers and within the grasp of the operator while exercisingcontrol over the same for moving said third controlled member.

4. The combination with electric motors and controlling means therefor,of operating devices for said controlling means comprising a pair ofoperating levers, a controlled member for each, and operatingconnections between the same, a third controlled mem her, and means uponeach controlling lever connected to said third controlled member andacting to move the same, one in one direction and the other in theopposite direction.

5. In a system of control the combina tion with one or more electricmotors and el .ctric controlling 'means, of a pair of axially alinedcontrolled levers each having its controlledrmember and operatingconnections therewith, of a third controlled member, an operating membertherefor axially alined with said operating lever, and means upon one ofsaid operating levers and within the grasp of the operator whileexercising his control over the same for mov ing said operating member.

(5. A hoisting apparatus having a trolley carriage, a grab suspendedthereon, one or more operating cables for raising or lowering the bucketand opening and closing the jaws thereof, means for traversing,retarding and holding fixed the carriage. means for winding in, holdingand retarding the unwinding of said operating cable or cables, and meansmounted upon and movable with a pair of controlling devices only foroperating all of said controlling means.

7. A hoisting apparatus having a trolley carriage and a bucket or grabsustained thereon, an operating cable or cables for raising or loweringthe bucket and opening or closing the jaws thereof, a motor fortraversing the carriage, a motor for raising and lowering the bucket, amotor for opening and closing the jaws thereof, controlling means fordriving the traversing motor in either direction, controlling means forcontrolling the hoisting motor and the opening and closing motor, andoperating devices for said controlling means comprising a pair of handlevers for two of said controlling means, and means upon one of saidhand levers for controlling the remaining controlling means.

8. In a hoisting apparatus the combination with a trolley carriage, of agrab sustained thereon, a cable for raising and lowering the grab, acable for opening and. closing the jaws thereof, an operating lever forcontrolling the movement of each of said cables, a traversing motor forthe carriage, and controlling means for the traversing carriage locatedupon one of the controlling levers for said grab operating cables andwithin the grasp of the operator while controlling the same.

9. A hoisting apparatus having a trolley, a grab, an opening and closingcable therefor, a hoisting cable, a controlling lever for controllingthe movements of each, each of said controlling levers when in oneposition acting to wind in its cable, in another position to hold thesame, and in a third position to retard the unwinding movement of thesame, and means upon one of said levers for controlling the traversingmovement of the carriage.

10. A hoisting apparatus having a trolley,

a grab. an opening and closing cable therefor, a hoisting cable, acontrolling lever for controlling the movements of each, each of saidcontrolling levers when in one position acting to wind in its cable, inanother posi tion to hold the same, and in a third position to retardthe unwinding movement of the same, means upon one of the controllinglevers for moving the carriage in one direction, and means upon theremaining lever to move the same in the opposite direction.

11. A hoisting apparatus having a trolley carriage, a grab, an openingand closing cable, a hoisting cable, an electric driving motor with itswinding drum for controlling said hoisting cable, and a second motor andits drum for the said opening and closing cable, controlling means foreach motor having circuit establishing means for driving its motor towind in the cable or for allowing the same to unwind while dynamicallyretarded and also for holding the winding drum fixed, an operatingmember for each controller, and auxiliary operating devices upon eachmember and adapted to be grasped by the operator while exercisingcontrol over the same, said auxiliary devices causing one, the traverseof said carriage in one direction, and the other, the traverse of thecarriage in the opposite direction.

12. A hoisting apparatus having a trolley, a traversing motor therefor,a grab, operating cables for said grab, a controller for said. motorhaving circuit establishing means for connecting said motor to operateeither as a motor or as a dynamo, and a separate emergency brake forholding said trolley carriage fixed.

13. In a system of control the combination with a pair of motors of apair of controlling levers, a motor controller operated bv each lever, athird motor with its controller and controlling devices within the graspof the operator while simultaneously exercising his control upon thesaid controlling levers for operating the third controller.

let. The combination with motors and controlling means therefor, ofoperating devices for said controlling means comprising a pair ofoperating levers, a controlled member for each, and operatingconnections between the same, a third controlled member, and means uponeach controlling lever connected to said third controlled member andacting to move the same, one in one direction and the other in theopposite direction.

15. In a system of control the combination with one or more motors andelectric controlling means, of a pair of axially alined controlledlevers each having its controlled member and operating connectionstherewith, of a third controlled member, an operating member thereforaxially alined with said operating lever, and means upon one of saidoperating levers and within the grasp of the operator while exercisinghis control over the same for moving said operating member.

16. In a system of control the combination with a pair of electriccontrollers each having its controlling, actuating member, a pivotedcontrolling lever for each, operative connections between eachcontrolling lever and its controller comprising a gear connected to turnwith the lever and an 1ntermeshing gear connected to turn each its con-'troller, said controlling levers being pivoted in axial alinement, athird controller, an operating member connected to move said thirdcontroller and extending axially through said operating levers, andmeans upon the operating levers for reciprocatively moving said axiallymovable operating member, said means being within the grasp of theoperator while exercising his control over the said controlling levers.

17 In a system of control the combination with a pair of electriccontrollers, a pivoted controlling lever for each, operative connectionsbetween each controlling lever and its controller, a third controller,an operating member connected to move said third controller andextending axially through said operating levers, and a pivoted hand gripupon a controlling lever for moving said axially movable operatingmember.

18. In a system of control the combination with a pair of electriccontrollers, a pivoted controlling lever for each, operating connectionsbetween each lever and its controller, a third controller, anoperating-member connected to move said third controller, and means uponthe operating levers for moving said axially moving member comprising ahand grip and connections between the same and said operating member.

19. In a system of control the combination with a pair of motorcontrollers, a pivoted controlling lever for each, operative connectionsbetween each lever and its controller, a third controller, an operatingmember connected to move said third controller, means upon the operatinglevers for reciprocatively moving said operating memher, the sameincluding a pivotedv hand grip upon each hand lever, connections betweensaid hand grip and the operating member,

one of said hand grips being operative to.

move said member in one direction and the other in the oppositedirection, and means for maintaining said operating member normally in aneutral orintermediate position.

20. The combination with a trolley carriage, a propelling motor thereon,a grab suspended thereby, a pair of grab controlling levers on saidcarriage and means within the grasp of the operator for controlling thetraversing motor while still exercising his control upon the grabcontrolling levers.

21. A hoisting apparatus having a selfpropelled carriage, a grabsuspended thereon, a pair of operating cables for raising and loweringthe grab and opening and closing the jaws thereof, a pair of controllinglevers for controlling said cables, a trolley traversing controller andmeans upon the grab controlling levers for operating said trolleytraversing controller.

said means being within the grasp of the operator while still exercisingl11S- control over the said levers.

In a. hoisting apparatus the combination with a self-propelled carriageof a grab, a motor for raising and lowering the bucket,a motor foropening and closing the bucket jaws, a controlling member forcontrolling each motor and means within the grasp of the operator whileexercising his control over the said controlling members for controllingthe traverse of the trolley.

23. A hoisting apparatus having a trolley carriage, a grab sustainedthereon, an electric motor for raising and lowering the grab, anelectric motor for opening and closing the jaws, and controllers forsaid motors, said controllers having each means to establish connectionsfor dynamic braking.

24:. A hoisting apparatus having a trolley carriage and a bucket or grabsustained thereon, a motor for raising and lowering the bucket, a motorfor opening and closing the jaws thereof, controlling means for saidmotors comprising a pair of controlling members, and means within thegrasp of the operator while still exercising his con trol over saidcontrolling members for controlling the traverse of the trolleycarriage.

25. A hoisting-apparatus having a trolley carriage, a grab, an openingand closing cable, a hoisting cable, an electric driving motor with itswinding drum for controlling said hoisting cable, and a second motor andits drum for the said opening and closing cable, controlling means foreach motor having circuit establishing means for driving its motor towind in the cable or r'or allowingthe same to unwind while dynamicallyretarded and also for holding the winding drum fixed, and an operating1nem her for each controller.

In a hoisting apparatus the combination with a grab of a trolley. meansfor traversing the trolley, means for controlling the trolley traverse,a pair of levers controlling the grab, and means on said levers forjointly controlling the trolley traverse controller.

27. The combination with a grab of a trolley, an electric motor fordriving the trolley, levers controlling the grab, and means on the grablevers for controlling the trolley motor.

28. The combination with a trolley of a grab, a trolley motor, grabcontrolling le vers, and means on a grab-controlling lever forcontrolling and reversing said trolley motor.

29. The combination with a trolley of a grab,-an electric driving motorfor the trolley, grab controlling levers, and means on agrab-controlling lever for controlling and reversing said trolley motor,

30. In a hoisting apparatus the combination ofa winding drum, anelectric driving motor for the winding drum, a control ling lever forsaid hoisting apparatus and a hand-operated device upon said controllinglever, but movable independently thereof, for controlling said electricmotor.

31. In a hoisting apparatus the combination of a trolley, a bucket, amotive device for the bucket, a controlling lever for the bucket, adriving motor for the trolley, a controlling switch for the motor, andmeans for operating said switch mounted upon the controlling lever.

32. In a hoisting apparatus the combination of a pair of controllinglevers, a grasping device mounted upon each lever, a controlling memberarranged axially with the said controlling levers, and connectionsbetween said controlling member and said grasping devices for causingmovement of the former under control of the latter.

38. In a hoisting system the combination of a pair of controllinglevers, a sliding rod extending axially through the same, a graspingdevice upon each lever connected to move said rod, one in one directionand the other in the opposite direction, and means for holding said rodnormally in a central or neutral position.

34. In a hoisting apparatus the combination with a trolley of a bucket.a pair of bucket controlling levers, an electric driving motor for thetrolley, and means on each of said levers for jointly controlling themotor.

In hoisting apparatus the combination with a trolley of a bucket, a pairof bucket controlling levers, an electric motor for propelling thetrolley, a controlling device on one of said levers adapted to start thetrolley motor, and a device on the other of said levers adapted toreverse the motor.

36. In a hoisting apparatus the combination with a trolley, a bucket, apair of bucket controlling levers, a trolley motor, a motor controller,and a hand lever on each of said bucket levers, one of said hand leversbeing connected to the controller to start the motor in one directionand the other being con nected to said controller to start the motor inthe opposite direction.

7 37. In a hoisting apparatus, the combina tion with a bucket, a pair ofbucket ropes, rope winding drums. a motor directly connected to eachwinding drum, a traversing support. a pair of bucket controlling leversand means for controlling the traverse of said support adapted to begrasped by the hand of the operator while holding said levers.

38. In a hoisting apparatus, the combination with a bucket, a bucketrope, a rope winding drum and directly connected mtor, a traversingsupport, a bucket controL ling lever, and means for controlling thetraverse of said support adapted to be grasped by the hand of theoperator while holding said lever.

39. In a hoisting apparatus, the combination with a bucket, a bucketrope, a rope winding drum and directly connected motor, a traversingsupport, a bucket controlling lever, and means for controlling thetraverse of said support including a manually actuated element connectedto said le ver.

4-0. In a hoisting apparatus, the combination with av bucket, a bucketrope, a rope winding drum and directly connected motor, a traversingsupport, a bucket controlling lever, and means for controlling thetraverse of said support including a member connected to said lever.

41. In a hoisting apparatus, the combination with a bucket, a pair ofbucket ropes and rope winding drums each directly connected to a drivingmotor, a traversing support, a pair of bucket controlling members andmeans for controlling the traverse of said support including a manuallycontrolled device upon one cf said levers.

5 .2. In a hoisting apparatus, the combination with a bucket, atraversing support, a pair of bucket operating motors, a traversingmotor and means enabling a single op erator to control said threemotors.

48. In a hoisting apparatus, the combination with a bucket, a traversingsupport, a pair of bucket operating motors, a traversing motor andgrasping devices for the two hands of the operator to control said threemotors.

M. In a hoisting apparatus, the combination with bucket, a traversingsupport, a bucket rope. a rope winding drum, an electric motor forturning said drum, a brake, means for automatically applying the brake,and means for releasing the same when the power is applied to the motor.

to. In a hoisting apparatus, the combination with a bucket, a traversingsupport, bucket operating ropes, a traversing motor, a brake for saidsupport, means for automatically applying the brake, and means forreleasing the same when the power is applied to the motor.

46. In a hoisting apparatus, the combination with. a bucket, atraversing support, a bucket rope. a rope winding drum, an electricdriving motor. the latter having circuit establishing means for allowingthe drum to unwind while the motor is dynamically retarded, a brakenormally applied and means for automatically releasing the brake whenthe motor is dynamically retarded.

4. In a hoist-ing apparatus, the combination with a bucket of atraversed support, traversing means including a prime mover, a pair ofmanually operated bucket controlling members, a grasping device on onemember to cause movement of the prime mover in one direction and agrasping device on the other member to cause movement of the prime moverin the other direction.

428. The combination with a bucket of a traversing support, a motor fortraversing said support, means for reversing the mo -tor,a pair'ofbucketcontrolling levers we a graspmg dev1ce on one of said levers forgrab, anelectric driving motor for the trolley, grab controlling levers andmeans for controlling and reversing said trolley motor including amember so connected to a grab controlling lever as to be operated by theoperator while still maintaining his hold upon the grab controllinglever.

51. A hoisting apparatus having a bucket, a trolley, a pair of handoperated levers for controlling the bucket, a motor for traversing thetrolley, means for reversing the motor, and simultaneously controlledauxiliary means associated with the bucket controlling levers forstarting, stopping and reversing the motor, said means being within thecontrol of the same operator to start, stop and reverse said motor whilemaintaining his hold upon the bucket operating levers.

A hoisting apparatus having a bucket, a trolley, a pair of hand operatedlevers for controlling the bucket, a motor for traversing the trolley,means for reversing the motor, simultaneously controllable means associated with the bucket controlling levers for starting, stopping andreversing the motor, said means including a movable member so connectedto a bucket lever as to be operated by the operator while stillmaintaining his hold upon the lever.

53. A hoisting apparatus having a bucket, a trolley, a pair of leversfor controlling the bucket, a motor for traversing the trolley, meansfor reversing the motor, a trolley brake, and means for starting,stopping and reversing the motor and for controlling the brake, saidmeans including a movable member so connected to one of said levers asto be operated by the operator while still main taining his hold uponthe lever. I

54. In a hoisting apparatus the combination with a winding drum, 'of adrivingmotor therefor, a motor controller, a hand lever connected tooperate said controller, asecond" motor embodied in the "hoistingappar-arms, a motor controller, a member to operate said controllermounted to move in a line with the axis of said lever, a hand grip leverpivotally mounted on said controller lever, and connections between saidhand grip lever and said axially movable member to cause the movement ofthe latter.

In a hoisting apparatus, the combination with a hoisting device of arotary motor for performing one movement of said device, a motorcontroller, a controlling lever therefor. a second rotary motor forperforming a difierent movement of said'device, a motor controllertherefor, and means mounted upon said controlling lever for moving saidsecond motor controller.

56. In a hoisting apparatus, the combination with a hoisting device of arotary motor for performing one movement of said device, a motorcontroller, a controlling lever therefor, a second rotary motor forperforming a different movement of said device, a motor controllertherefor, and means mounted upon said controlling lever for moving saidsecond motor controller, said means comprising a pivoted hand gripmounted for movement independent of the movement of said controllinglever.

57. In a hoisting apparatus, the combi nation with a hoisting device ofa rotary motor for performing one movement of said device, a motorcontroller, a controlling lever therefor, a second rotary motor forperforming a different movement of said device, a motor controllertherefor, and

means mounted upon said controlling lever for moving said second motorcontroller, sa1d means comprising a member mounted for movementindependent of the movement of the controller lever.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

ALMON E. NORRIS.

W tnesses:

THOMAS B. BoorH, IRVING U. TowNsnND.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

' Washington, I) 0.

